题目内容
2. [2014 '北京卷]I found the lecture hard to follow because it when I arrived.
A. started B. was starting
C. would start D. had started
2. D考查动词的时态。根据句意可知,"我"不能跟上演讲的原因是,"我"到达的时候演讲已经开始了。"到达"为一般过去时,表示过去的动作。"已经开始"表示过去的过去,应该用过去完成时。故选D。
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